#include "construction.hh"
#include <iostream>
#include "der_construction.hh"
int main()
{
	sum *class_sum= new sum;
	class_sum->chushihua(10,20);
	class_sum->shuchu();

	der_construction * class_der=new der_construction();
	class_der->show(10,20);
	class_der->chushihua(33,44);
	class_der->shuchu(); //这里是基类的函数
	delete class_der;
	delete class_sum;
	return 0;
}
